u/Double-Emu-3031

I’ve just started trying my hand at drawing again after several years. Lately just been doing fairly rough sketches. Been really relying on references (the one attached was basically my direct reference) and I’m struggling a lot with proportions. In this one specifically the head and the right hand are the most noticeable to me, but there’s something else that feels off that I can’t place. Would love to hear any tips as well as any further critique.